20x15 puzzle
Time:
2
1
3
1
3
2
1
3
2
3
1
1
3
1
1
3
1
1
1
3
1
1
1
3
1
2
3
2
1
3
2
2
2
3
4 2
3
1
3
1
4
6 6 6 7
 
 
 
 
7
1  1
 
11  1  1
12  7
11  4
2  5
4  12
6  11
8
1  2
You might wish to visit the archives, if you want more.